With its built-in wrist support and neutral grip, the ergonomist-approved Pro Fit Ergo Wireless Mouse positions your hand for improved comfort. Features include dual wireless (2.4 GHz and Bluetooth 4.0 LE) with 128-bit AES encryption security, quiet clicking, five buttons (including forward and back), a replaceable receiver*, a three-mode power-saving switch and three DPI settings (800/1200/1600). * In the event the receiver is lost or damaged, simply purchase a new one, pair it with your mouse and you’re ready. Ergonomist-approved design positions your hand for improved comfort. Built-in wrist rest and neutral grip supports, cushions and positions the wrist for comfort and neutral hand alignment.Dual wireless with 128-bit AES encryption security delivers the flexibility of 2.4 GHz and Bluetooth 4.0 LE, with government-grade encryption. Quiet clicking makes for smooth and non-disruptive operation. Five buttons (including forward and back) enhance navigation and productivity. Three-mode power-saving switch allows you to toggle between 2.4GHz, Bluetooth and Off for best battery life. Three DPI settings (800/1200/1600) let you dial in the sensitivity and precision of your mouse cursor. Optimised for your Windows 11 mouse needs.